New taxes to take effect to fund health care law

WASHINGTON — For more than a year, politicians have been fighting over whether to raise taxes on high-income people. They rarely mention that affluent Americans will soon be hit with new taxes adopted as part of the 2010 health care law.

The new levies, which take effect in January, include an increase in the payroll tax on wages and a tax on investment income, including interest, dividends and capital gains.

Affluent people are much more likely than low-income people to have health insurance, and now they will, in effect, help pay for coverage for many lower-income families. Among the most affluent fifth of households, those affected will see tax increases averaging $6,000 next year, economists estimate.

To help finance Medicare, employees and employers each now pay a hospital insurance tax equal to 1.45 percent on all wages. Starting in January, the health care law will require workers to pay an additional tax equal to 0.9 percent of any wages over $200,000 for single taxpayers and $250,000 for married couples filing jointly.

The new taxes on wages and investment income are expected to raise $318 billion over 10 years.

Ruth Wimer, a tax lawyer at McDermott Will & Emery in Washington, said the taxes came with “a shockingly inequitable marriage penalty.” If a single man and a single woman each earn $200,000, she said, neither would owe any additional Medicare payroll tax. But, she said, if they are married, they would owe $1,350.

Since the creation of Social Security in the 1930s, payroll taxes have been levied on the wages of each worker as an individual.

The new Medicare payroll is different. It will be imposed on the combined earnings of a married couple.

Employers are required to withhold Social Security and Medicare payroll taxes from wages paid to employees. But employers do not necessarily know how much a worker's spouse earns and may not withhold enough to cover a couple's Medicare tax liability. Indeed, the new rules say employers may disregard a spouse's earnings in calculating how much to withhold.

Workers may thus owe more than the amounts withheld by their employers and may have to make up the difference when they file tax returns in April 2014.

Donald Marron Jr., director of the Tax Policy Center, a joint venture of the Urban Institute and the Brookings Institution, said the burden of the tax arising from the Affordable Care Act would be borne by the most affluent taxpayers, with about 85 percent of the revenue coming from 1 percent of taxpayers.